#include<stdio.h>

void swap(int *p1, int *p2)
{
	int temp;
	temp = *p1;
	*p1 = *p2;
	*p2 = temp;
}
int main(void)
{
	int a, b;
	int *pointer_1, *pointer_2;
	scanf("%d,%d", &a, &b);
	pointer_1 = &a;
	pointer_2 = &b;
	swap(pointer_1, pointer_2);
	printf("\n%d,%d\n", a, b);
}


